/**
    *       Copyright 2010 Newcastle University
    *
    *          http://research.ncl.ac.uk/smart/
    *
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.apache.amber.oauth2.client.demo.controller;
  
  
  import java.io.IOException;
  import javax.servlet.http.Cookie;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.apache.amber.oauth2.client.demo.exception.ApplicationException;
  import org.apache.amber.oauth2.client.request.OAuthClientRequest;
  import org.apache.amber.oauth2.common.exception.OAuthSystemException;
  import org.apache.amber.oauth2.common.message.types.ResponseType;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.apache.amber.oauth2.client.demo.model.OAuthParams;
  import org.springframework.stereotype.Controller;
  import org.springframework.web.bind.annotation.ModelAttribute;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.servlet.ModelAndView;
  import org.springframework.web.servlet.view.RedirectView;
  
  import org.apache.amber.oauth2.client.demo.Utils;
  
  /**
   * Handles requests for the application welcome page.
   *
   */
  @Controller
  @RequestMapping("/")
  public class AuthzController {
  
  
      private Logger logger = LoggerFactory.getLogger(AuthzController.class);
  
      @RequestMapping("/authorize")
      public ModelAndView authorize(@ModelAttribute("oauthParams") OAuthParams oauthParams,
                                    HttpServletRequest req,
                                    HttpServletResponse res)
          throws OAuthSystemException, IOException {
  
          try {
  
              Utils.validateAuthorizationParams(oauthParams);
  
              res.addCookie(new Cookie("clientId", oauthParams.getClientId()));
              res.addCookie(new Cookie("clientSecret", oauthParams.getClientSecret()));
              res.addCookie(new Cookie("authzEndpoint", oauthParams.getAuthzEndpoint()));
              res.addCookie(new Cookie("tokenEndpoint", oauthParams.getTokenEndpoint()));
              res.addCookie(new Cookie("redirectUri", oauthParams.getRedirectUri()));
              res.addCookie(new Cookie("scope", oauthParams.getScope()));
              res.addCookie(new Cookie("app", oauthParams.getApplication()));
  
              OAuthClientRequest request = OAuthClientRequest
                  .authorizationLocation(oauthParams.getAuthzEndpoint())
                  .setClientId(oauthParams.getClientId())
                  .setRedirectURI(oauthParams.getRedirectUri())
                  .setResponseType(ResponseType.CODE.toString())
                  .setScope(oauthParams.getScope())
                  .buildQueryMessage();
  
              return new ModelAndView(new RedirectView(request.getLocationUri()));
  
          } catch (ApplicationException e) {
              oauthParams.setErrorMessage(e.getMessage());
              return new ModelAndView("get_authz");
          }
      }
  
  
  }